The arrival of Spanish settlers had a great impact on the natives of the borderlands. The Pueblo people learned from the Spanish how to use new tools, grow new food, and raise sheep for wool. In turn, the Indians introduced the Spanish to new techniques for growing crops in the desert soil.Some Native Americans even <span>converted to the Catholic faith.</span>
I would have to say that the best way to revise sentence four is by changing "aren't" and "they're" to "are not" and "they are."
"Argue" works better than "fight."
Deleting the entire sentence would remove the transition into cost efficiency of the tablets.
And moving the sentence to the end would place the transition to cost efficiency in the wrong place.
I am pretty sure that it is C.
I'd say its the second choice
